Index: /trunk/src/org/openstreetmap/josm/gui/dialogs/relation/RelationTreeCellRenderer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/dialogs/relation/RelationTreeCellRenderer.java	(revision 4590)
+++ /trunk/src/org/openstreetmap/josm/gui/dialogs/relation/RelationTreeCellRenderer.java	(revision 4591)
@@ -64,4 +64,9 @@
     public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded,
             boolean leaf, int row, boolean hasFocus) {
+
+        // Hackish fix for #7056 - if name template for duplicated relation contains tags from parent, template will fail because getReffers doesn't work on primitives not yet in dataset
+        if (!tree.isRootVisible() && tree.getModel().getRoot() == value)
+            return this;
+
         renderIcon();
         renderValue((Relation)value);